. >> and last week, the south carolina republican senator lindsay graham also made the case for a possible attack saying if we engage in military operations as a last resort, the united states should have in mind the goal of changing the regime, not by invading but by launching a military strike by air and sea. our national correspondent steve centanni live at the pentagon now and steve, there are obviously risks and they are large to launching military strikes on iran. >> that's right, shep. even though the military attack would be a very carefully targeted air strike that would minimize any casualties on the ground or casualties among american or other allied troops, still there are risks and those are especially that there could be retaliation by iran or by its proxies which include hezbollah in lebanon or hamas in gaza and the target could be israel in that case and so the fears are this could destablize the whole region and lead to a wider war. >> all this talk comes at the same time iranians are getting hit with new sanctions. >> yeah, different kind of sanction, too. you know there'